The investigation, led by Inspector Gopalakrishnan—who has a personal grudge against Ezhil—and Sub-Inspector Malarvizhi, becomes a high-stakes puzzle. Since the twins share identical DNA and fingerprints, the police cannot scientifically prove which brother was at the scene.

The story kicks off with the brutal murder of a young man named Akash. A selfie found on the victim's phone provides the police with a clear image of the suspect.

Play the romantic interests of Ezhil and Kavin, respectively, contributing to the emotional depth of the backstory.

Plays SI Malarvizhi, whose logical approach contrasts with her superior's bias.

The 2019 Tamil investigative crime thriller (transl. "Trail") remains one of the most acclaimed films in South Indian cinema, widely known for its complex dual-narrative and mind-bending twists. Directed by Magizh Thirumeni and starring Arun Vijay in a career-defining double role, the film explores a unique legal loophole involving identical twins. Plot Overview: A Murder and Two Suspects